United Kingdom is +44

A local writes 07700 900123 — the dialer below turns that into what you press.

Country code
+44
Dialing out
00
Trunk prefix
0

The leading zero never travels: 07700 900123 is +44 7700 900123 abroad. That particular number is safe to print — Ofcom reserves 07700 900000 to 900999 for fiction, which is why every British TV drama hands out an 07700 number. Mobiles own the 07 range, 020 is London, and 00 dials out. Expect odd lengths on some old area codes.

Mostly eleven digits with the zero: mobiles on 07xxx, London 020, freephone 0800; lengths vary at the edges.

You dial

011 44 7700900123

011 exits United States · 44 reaches United Kingdom · the leading 0 stays home. From any mobile, +44 7700900123 works worldwide.

Type the number the way a local writes it — the arithmetic is derived from each country's ITU plan.

Plan facts verified against ITU-T E.164 assigned country codes · Telephone numbers in the United Kingdom — Wikipedia. Prose is our own.

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